HexOutputStream.java revision 608:7e06bf1dcb09 
1/*
2 * Copyright (c) 1996, 2002, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26package com.sun.corba.se.impl.orbutil;
27
28import java.io.StringWriter;
29import java.io.OutputStream;
30import java.io.IOException;
31
32/**
33 * Writes each input byte as a 2 byte hexidecimal output pair making it
34 * possible to turn arbitrary binary data into an ASCII format.
35 * The high 4 bits of the byte is translated into the first byte.
36 *
37 * @author      Jeff Nisewanger
38 */
39public class HexOutputStream extends OutputStream
40{
41    static private final char hex[] = {
42        '0', '1', '2', '3', '4', '5', '6', '7',
43        '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'
44    };
45
46    private StringWriter writer;
47
48    /**
49     * Creates a new HexOutputStream.
50     * @param w The underlying StringWriter.
51     */
52    public
53        HexOutputStream(StringWriter w) {
54        writer = w;
55    }
56
57
58    /**
59     * Writes a byte. Will block until the byte is actually
60     * written.
61     * param b The byte to write out.
62     * @exception java.io.IOException I/O error occurred.
63     */
64    public synchronized void write(int b) throws IOException {
65        writer.write(hex[((b >> 4) & 0xF)]);
66        writer.write(hex[((b >> 0) & 0xF)]);
67    }
68
69    public synchronized void write(byte[] b) throws IOException {
70        write(b, 0, b.length);
71    }
72
73    public synchronized void write(byte[] b, int off, int len)
74        throws IOException
75    {
76        for(int i=0; i < len; i++) {
77            write(b[off + i]);
78        }
79    }
80}
81